Apobaetis jaquelinae, De Lima & Cruz & Hamada, 2023

De Lima, Cláudia R. T., Cruz, Paulo Vilela & Hamada, Neusa, 2023, Additions and corrections to taxonomy of Apobaetis fiuzai Salles & Lugo-Ortiz, 2002 and Apobaetis kallawaya Nieto, 2006 (Ephemeroptera, Baetidae), European Journal of Taxonomy 879 (1), pp. 136-161 : 149-153

Apobaetis jaquelinae sp. nov.

urn:lsid:zoobank.org:act:806D9CCD-9AB3-402E-9D58-FA64C2C1DEF4

Figs 1 , 6–8

Apobaetis fiuzai – Boldrini & Cruz 2014: 4.

Diagnosis

NYMPH. Characterized by a combination of the following characters: 1) labrum rectangular, distal medial margin with one protuberance; dorsal surface with 3 elongated and blunt medial setae near distal margin ( Fig. 7A–B ); 2) hypopharynx with lingua subcircular, with apical tuft of setae, length subequal to superlingua ( Fig. 7E ); 3) maxillary palp long 1.7× length of galea-lacinia; segment II without apical constriction ( Fig. 7F ); 4) labial palp with segment II with triangular distomedial projection with rounded apex, laterally directed; segment III rectangular, distal margin concave ( Fig. 7G ); 5) foreleg with anterior surface of femur with one row of 8 to 9 short concave setae slightly pectinated on apex; apex with 2 short concave setae slightly pectinated on apex; claw 0.6–0.7 × length of tarsus, with two row of denticles restricted to middle portion ( Fig. 8A–C ); 6) posterior margin of tergum IV with triangular and pointed spines in regular sizes ( Fig. 8D ); 7) paraproct with several marginal spines, posterolateral extension with blunt spines ( Fig. 8F ).

Etymology

The species name is a tribute to Dr Jaqueline Góes, from the Instituto de Medicina Tropical de São Paulo, who was part of the team that developed and improved the viral genome sequencing protocols for the rapid sequencing of the coronavirus (SARS-CoV2).

Material examined

Holotype BRAZIL • nymph on slide; Rondônia, Teixeirópolis , Vale das Cachoeiras; 10º55′20.4″ S, 62º22′34.7″ W; 10 Jul. 2018; P. V. Cruz, N. Hamada and G. Desidério leg.; INPA.

Paratypes BRAZIL • 2 nymphs on slide; same collection data as for holotype; INPA .

Additional material

BRAZIL – Rondonia • 1 nymph on slide; Colorado do Oeste, Rio Cabixi ; 13º15′31.8″ S, 60º20′04.8″ W; 3 Sep. 2012; N. Hamada and R. Boldrini leg.; INPA • 1 nymph on slide; Nova Londrina, Rio Urupá ; 11º02′05.8″ S, 62º08′34.1″ W; 9 Jul. 2018; P. V. Cruz, N. Hamada and G. Desidério leg.; INPA .

Description

Nymph

LENGTH. Body: 2.5–2.8 mm.

HEAD. Antenna: flagellum with minute spines on apex of each flagellomere. Labrum ( Fig. 7A–B ): length about 0.6× of maximum width; distal medial margin with one protuberance, distolateral margin rounded; dorsal surface with 3 elongated and blunt medial setae near distal margin; medially with one row of long and thin setae near distal margin; long, thin and simple setae covering dorsal surface; ventral surface with one row of spine-like setae on distolateral and distal margins. Left mandible ( Fig. 7C ): incisors not fused; outer and inner set of incisors with 4 and 3 denticles, respectively; prostheca robust, bifurcated at apex, outer lobe robust, inner lobe slender with medial tuft of setae; margin between prostheca and mola concave; subtriangular process wide with short protuberance on distal margin; tuft of setae at base of subtriangular process; denticles of mola not constricted; lateral margin convex. Right mandible ( Fig. 7D ): incisors not fused; outer and inner set of incisors each with 3 denticles; prostheca slender, bifurcated at apex, tuft medial of minute setae; margin between prostheca and mola concave; tuft of setae at base of mola absent; denticles of mola not constricted; lateral margin convex. Hypopharynx ( Fig. 7E ): lingua subcircular, apex covered with short setae, subequal to superlingua; superlingua not expanded, with short, thin, simple setae over distolateral and distal margin. Maxilla ( Fig. 7F ): maxillary palp long, 1.7× length of galea-lacinia; segment I 0.6× length of galea-lacinia; segment II tapering slightly from base to apex, with thin and simple setae scattered on surface, without apical constriction; medial margin of galea-lacinia with 2 to 3 spine-like setae. Labium ( Fig. 7G ): glossa subcircular, robust, narrowing apically, subequal to paraglossa; dorsal surface with one longitudinal row of 4 short spine-like setae near inner margin; 2 short spine-like setae near internal margin, thin and simple setae and one robust spine-like setae on apex; longitudinal row of 9 robust spine-like setae on apical ⅔ near outer margin; ventral surface covered with long, thin and simple setae. Paraglossa curved inward; dorsal surface with long and robust spine-like setae on apex; longitudinal row of 15 long spine-like setae on apical ⅔ near outer margin and one longitudinal row of 5 long and robust spine-like setae on apical ⅔ near inner margin; ventral surface with one longitudinal row of 5 robust and long spine-like setae on apical ⅔. Labial palp with segment I 0.7 × length of segments II and III combined, covered with micropores (not illustrated); segment II with outer margin covered with thin, long and simple setae, inner margin bare; segment II with triangular distomedial projection, with rounded apex, laterally directed; ventral surface of distomedial projection with thin, long and simple tuft of setae; segment III rectangular, with concave distal margin, length 0.6× width, covered with thin, long and simple setae on outer margin, dorsally with one row of 11 to 13 spine-like setae in different sizes near distal margin, ventrally with 8 to 10 spine-like setae in different sizes near distal margin.

THORAX. Holotype pigment ( Fig. 6A–B ): light yellow, with brown marks; forewing pads with basal brown mark. Paratype pigment, nymph female ( Fig. 6C ): light yellow, with lateral brown mark. Foreleg ( Fig. 8A–C ). Femur: anterior surface with one row with 8 to 9 short concave setae slightly pectinated on apex near dorsal margin; apex of femur with 2 short concave setae slightly pectinated on apex; ventral margin with one row of 10 to 12 spine-like setae of different sizes. Tibia: dorsal margin bare; ventral margin with one row of 10 to 11 spine-like setae. Patella-tibial suture present, from dorsal margin to ventral margin. Tarsus: dorsal margin bare; ventral margin with one row of 11 to 12 spine-like setae. Claw: 0.6–0.7× length of tarsus, with two rows of denticles restricted to middle portion. Middle and hindleg similar to foreleg.

ABDOMEN. Holotype pigment, nymph male ( Fig. 6A–B ): tergum V with lateral brown mark; posterior margin of tergum V with medial brown mark and sublateral brown spots; tergum VI with central brown mark; anterior margin of tergum VII with medial brown mark and short spots; terga VIII and IX with lateral brown mark and short spots; sterna II–VII with anterolateral brown mark and with lateral brown mark; sternum VIII brown; sternum IX with anterior margin brown mark. Paratype pigment. Nymph female ( Fig. 6C ). Tergum II with medial brown mark; terga III and V with lateral brown mark; terga II– IV covered by reddish brown pigmentation. Tergum IV ( Fig. 8D ): surface covered by triangular scale-like projections and micropores; posterior margin with triangular and pointed spines, in regular sizes. Gill ( Fig. 8E ): triangular apex, trachea conspicuous; long length, extending to half of third subsequent tergum. Paraproct ( Fig. 8F ) with several marginal spines. Posterolateral extension with blunt spines. Cerci ( Fig. 8G ) with spines in all segments. Paracercus ( Fig. 8H ) with prominent spines in all segments.

Figures

Fig. 1. Map with distribution of Apobaetis fiuzai Salles & Lugo-Ortiz, 2002 (including putative records) (black circles), Apobaetis pasternakae sp. nov. (yellow stars), Apobaetis kallawaya Nieto, 2006 (green square), Apobaetis jaquelinae sp. nov. (red triangles), and Apobaetis luanae sp. nov. (blue triangles).

Fig. 6. Apobaetis jaquelinae sp. nov., habitus of nymph. A–B. Holotype (INPA). A. Nymph male (d.v.). B. Nymph male (v.v.). C. Paratype (INPA), Nymph female (d.v.). Abbreviations: d.v. = dorsal view; v.v. = ventral view. Not to scale.

Fig. 7. Apobaetis jaquelinae sp. nov., holotype (INPA), mouthparts of nymph. A. Labrum (left d.v., right v.v). B. Detail of medial spatulate setae on dorsal surface of labrum. C. Left mandible. D. Right mandible. E. Hypopharynx. F. Maxilla. G. labium (left d.v., right v.v.). Abbreviations: d.v. = dorsal view; v.v. = ventral view. Not to scale.

Fig. 8. Apobaetis jaquelinae sp. nov., holotype (INPA), thorax and abdomen of nymph. A. Foreleg (femur on anterior surface). B. Detail of setae on anterior surface of forefemur. C. Claw. D. Posterior margin of tergum IV. E. Gill. F. Paraproct. G. Cercus. H. paracercus. Not to scale.